Telephone system



2 Sheets-Sheet 1.

W. A. GUSTAI'SON.

TELEPHONEk SYSTEM.

Patented June 28,1898.

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2 Sheets-Sheet 2.

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P'atented- June 28,1898.

viril!!! MMM Je @Mm JUNITED STATES ATnNT union.

TELEPHONE SYSTEM.

SPECIFICATION forming part of Letters Patent No. 606,2'85, dated J une 28, 1898.

Application filed August 13,1896. Renewed January 11, 1898. Serial No. `666,372. (Noniodel.)

To all whom it may con/cern: i

Beit known that I, WIoToRA. GUsTAnsoN, a citizen of the United States of America, residing at Joliet, in the rcounty of Will and State of Illinois, have invented certain new and useful Improvements in an Electric Telephonie Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings, and the letters of reference thereon, forming a part of `this speciiication, in which- Figure l is a front elevation of the telephone apparatus. Fig. 2 is a sideelevation of the same. Figs.Y 3 and 4 are detailed sectional Views of the transmitter mechanism of,`

the apparatus, showing, respectively, its 4two positions. Fig. 5 is a detailed side view of a portion of the tranemitter-supporting arm of the apparatus and showing a lifting-spring applied thereto. Fig. 6 is a detailed sectional view of a portion of the transmitter of the apparatus, showing the manner of attaching and electrically connecting the binding-posts with the diaphragm thereof. Fig, 7 is a detailed cross-sectional view of the receiver-supporting lever of the apparatus, taken on aline immediately at one side of the hub thereof,

showing the application of a spring 4to said hub. Fig. 8 is a sectional view of said leverhub and of a switch-lever placed on the pivotstud of said lever, showing the application of a combined tension "and compression spring placed between said levers. Fig. 9 is a detailed side view of a portion of said receiverlever and its support. Fig. l0 is a detailed front view ofthe base portion of a push-button frame, showing the electric contact-plates thereof. Figpll is a4 detailed view of the latch mechanism of the apparatus for holdand electric sound transmitting and receiving devicessoarranged and combined as to be automatic in breaking and `,making the bell-call circuit when the transmitting and receiving devices are brought into service and replaced out of service; and to accomplish the object sought I have employed common electric bell-calls, common electric telephone-receivers, novel electric telephone transmitters, common secondary induction-coils, local batteries, push-button'circuit making and breaking devices, and electric conductors arranged connecting said parts` in the manner hereinafter described. y 1 c .5

Referring to the .aocornpanying drawings, I have illustratedgbut one apparatus; but, however, it will be understood that in service two or more stations are established and an apparatus placed at each station, the several apparatuses being electrically connected, and as the several apparatuses are constructed so as to be duplicates the illustration and description of one will be sufiicient to fully convey to others the natureof my invention. VReferring to the accompanying drawings, A is a backboard, to which the several parts of the apparatus aret attached and which is adapted to be secured to the side wall of a building or other convenient place, and thereby supported in a vertical position.

B represents a common electric bell-call device attached to the front 'side of said board,

as shown. Abovethe said bell-call device is a horizontally-extending stud IjI', attached to said board by means'of screws placed through screw-holes of its foot-piece H, and pivotally placed on said stud is aleverG, formed with a hook Gl atone end andl with an enlarged hub G', which hub is .made with an annular groove wherein a coil-spring J is placed, with one end thereof hookedl into a hole in lever G, as shown in Fig. l, and the opposite end of said spring is attached to apost J', as shown in Fig. l and more particularly, in ,Fig 7, which post is set in the board A. Said'spring is for the purpose.. of yieldingly holding up the hooked end of said lever G, to a limit governed by a keeper-hook L, attached to said board and inclosing the said lever adjacent to said hook G". Said lever-hub G is also chambered, as shown in section in Fig. 8, and sleeved on said stud H'. Back of said hub is IOO and in placing is given tension to yieldingly. hold said switch-lever to one side from avertical line against 'a stop-pin S2, set in board A, and is also of sufficient length to yieldingly hold lever-hub G a little distance ott from said switch-lever, which distance is established by a cotter I, placed through a hole in the end portion of stud Il', which holds said lever-hub seated on said stud, and said hub is also made with its end adjacent said cotter beveled each Wayv from said cotter, so

that said cotter rests in the hollow betweensaid beveled faces when the lever S is in a horizontal position, as shown in Fig. 9, and at such times said switch-lever S is free from pressure enough, so its spring S may throw it, as stated; but when the hooked end of le- -ver G is either up or down its full limit the turned position of hub G will cause said hubinclines to move under cotter I, and thereby force said hub against switch-lever S, and in so doing compress spring S/, and thereby .pinch the switch-lever S sufficiently hard, so

it may then be moved to bring its free end to any position within the limits of its movement, and thus be held against the tension ot thespring S, and when thus held perfect electric contact is insured between the stud footpiece H and switch-lever `S.

Attached to board A above lever G and on i a radius from hub G are plates V, V', and V2, which are so arranged that they mayseverally bein Vcontact with the free end of switch-leverS, and electrically connecting each of said plates, respectively, is a line-wire, said wires being respectively/'shown at 71 7L', and h2. The iirst plate'V, however, is intended to be in 1'connection with the main or principal linewire h. Hence the said switch-lever is made to be automatically thrown to be in contact 'with plate V by means of its tension-spring, as described, yso as 'to be constantly in circuit with said main line vand to be temporarily in` -circuit with other subordinate lines h' h2, connecting said plates V V2 by moving the `switch-lever S to be in contact with said subordinate plates when it is desired, and thereby 'adapt the apparatus to be brought in circuit with lines other than whatI have termed the ""'n'ain line.

To prevent too great movement -of switchn lever S against the tension of its spring S, a

second stop-pin 'S'is set in board A, 4asshown in-Fig. '1.

M represents a common telephone-receiver provided with `an eye c, adapting it to be' placed Vand hung on the hook G" vof lever G,

.and when ythus placed on said lever will, by

rea-son ofits weight, hold said hooked end of the "frictional contact between it and the switch-lever S is relieved, and the spring S then returns said switch-lever to contact with plate V of the main line 7L., so a call may be received. After a conversation the receiver is placed back on the hook of lever G. This will cause the switch-lever to automatically return to the terminal of the main line, as heretofore stated, so the operator is relieved from having to turn the switch-lever back to the terminal of the main line, thus leaving the switch in position so a call may be received from another station. This switch mechanism may be used on other kinds of telephones than the one described. The receiver is also provided with the usual electric conductors, (shown at R in Fig. 1,) the ends of which are respectively electrically secured in bindingposts P and P2, secured lto board A.

C is a telephone-transmitter arranged below the call-bell, the case of which is made of non-conducting material mounted on the outer end of a metal arm D, hinged at its inner end by means of a cross-bolt E2 to earlugs E of a metal bracket E, which is secured "to the board A by means'of screws, as shown.

In the bottom of the case of said transmitter is placed a metallic plate c, as shown in Figs. 3 and 4, said plate being secured therein by means of a screw d, passing through a hole therein and extending through a corresponding hole in the bottom of said case and turns into the extending end of arm D, thereby electrically connecting said plate and arm. A carbon plate y is placed on the outer tace of plate c" and is secured thereto by Vmeans of screws Z) b. Said carbon plate extends to within a short distance of a diaphragmfof the transmitter and is provided with sockets on its face toward said diaphragm,V said sockets being for the purpose of holding carbon balls a a, which, when the transmitter is in an upturned position, as shown in Figs. l and 4, will lie in said sockets, and thereby be -out of contact with said diaphragm; but when said transmitter is in an extending or horizontal position, as shown in Figs. 2 and 3, said balls will roll partially out of their sockets, and thereby'come incontact with said diaphragm. Said'diaphragm is made of carbon and is held seated on the rim of the transmitter-case by means of a screw-cap C', having a -central speaking-critics in the usual manner and is electrically connected with a binding-post g at the side of said case by means of a copper plate g and screw g', as shown in Fig. 6.

E3 is a coil-sprin g sleeved on the hinge-bolt E2 of arm D in a recess made in one side of said arm,'as shown in Fig. 5. One `end of said kspring enters a hole of said ar-m, and its opposite end bears against a side-extending pin Uof bracket E and in placing is given sutlicient tension to y-ieldingly'hold said arm D and transmitter C in an upturned position, as shown in Figs. l and 4, and when said arm -is in such position a contact-pointD thereof will be brought incontact with a spring-plate Z, which is electrically connected with a bind- IOO IIO

ing-post WV, Which is supported by `lout insu-I lated from bracket E by means of insulating- -Washers X and X', as shown in Figs. 3 and 4,

and When said arm D is brought to an extending position, as shown in Figs. 2 and 3, said point D will be disconnected from said plate Z.

Pivotally connected to bracket E is a bellcrank latch F, made at one end With a beveled latch-piece F and pivotally connected at its opposite end with lever G through the medium of the non-conducting connectingrod K, as shown in Fig. l, and when the receiver M is removed from lever G and the spring J has caused the hooked end of said lever to be thrown up to a position opposite to` that shown in Fig. l the said latch-lever will by gravity move so as to bring the latch F thereof in line with the side of arm D, so that as said arm is moved to an extending position its heel portion Will engage said latch and enter a side socket D.' of said arm, as

shown in Fig. 1l, and thereby hold said armextended to substantiallya horizontal position, as shown in Figs. 2and 3, Whichposition of parts Will be maintained until the receiver Mis again placed on lever G, when the VWeight of the receiver will bring down the hooked end of said lever, and` thus :raise its opposite end and lift rod` K and release arm D and permit spring E3 to return said arm to its upturned position. (Shown in Fig. l.) Attached to board A below said transmitter mechanism isa secondary induction-coil N, and below said coil is arranged a push-button frame O and contact-plates O' O2 O3. Also attached to said board are binding-posts P P3 P4, which posts P3. P4 are electrically connected through the medium of .conductors it@ With a battery QL Binding-post Pis for the connection of a ground-Wire m andis electrically connected by meansof a conductingwire m'with contact-plate O of the vpushbutton frame. Binding-postPis electrically connected with conductor fm', and hence with binding-post P and the ground-Wire m by!` means of a conducting-Wire m2, shunted ou said conductor-wire m. Binding-post P2 is electrically connectedwith one end of the secondary or induction coil N, the opposite end of said coil being connected, by means of a secondary Wire n2', with the foot-piece I-I and .through the medium of said foot-piece With switch-lever S, and saidcoil-Wire n. is also electrically connected with binding-post NV of bracket E and the spring contact-.plate Z thereof through the medium of a conductingwire p, which is shunted on said conductorwire n. Binding-post P.3 is electrically connected with the bracket E direct by means of` conducting-wire g and With one binding-post of the bell-call B by means of a conductorwire g', and binding-post P4 is electrically connected with contact-plate O of the pushbutton frame by` means of a conductor-Wire r and is also connected with one end, t, of the primary coily of the secondary coil N, While the opposite end, t, of said 4primary coilis electrically connected With binding-post g" of the transmitter C, and the contact-plate O. of the push-button frame is, through the medium of a conductor-Wire t2, electrically connected with the opposite vbinding-post of said bell-call, allA of which connections are fully right With its` point D' in contact with saidplate Z, thence through said arm to and through bracket E, thence throughconductor- Wire gto and through binding-post P3, thence through conductor-Wire q to the bell-call B, thence from said bell-call through conductor- Wire 2 to contact-plateO' of the push-button frame, thence through said plate to and` through contact-plate which tWo plates O and O" are so placed as to be in constant contact With each other, thence through con-` ductor-Wire m to and through binding-post P,

land from thence to the ground-Wire m and oit.

The transmitting call-circuit is as follows: Contact-plate Ol of the push-button trame being grounded through the medium oi conductor-Wire m', binding-post P, and wire m, and the contact-plate 0 being electrically connected with the battery Q through the medium of conductor-Wire r, binding-post P4, and conductor-Wire Z), the circuit ismade to the battery by pressing in the push-button O, which forces `contact-plate O in contact with plate OT', and `from the battery the circuit is made to the line-Wire h through conductor-Wire h', binding-post P3, conductor- Wire q, bracket E, 'armi D, contact-plate Z, binding-post W, conductor-Wirep, conductor- Wire n2, onto ywhich Wire p is shunted, foot-` plate H, switch-lever S, and contact-plate V. The binding-posts P3 and P'1 being electrically `connected with battery Q, as stated, and the post P4 being the positive pole, the primary -telephonic circuit is as follows: One end of the primary-coil Wire is electrically connected Awith the said binding-post P, and the electric circuit passes fromsaid post to and through said primary coil to and through itsopposite end t to binding-post g of the transmitter C,

thence through said postto plate g withinthe transmitter-case,and from thence to the transmitter-diaphragm f, which is in electric contact with said plate It will be understood that when using said circuit the transmitter O is .turned down to a horizontally-extending position, as shown inFigs. 2 and 4, whichv causes the balls a a to partially roll from their f sockets and come in contact with diaphragm f, and from said diaphragm the current passes to and through said carbon balls a @,thence IOO I'IO

to and through the carbon plate y, thence to and through bottom plate C', thence through plate-screw d to and through arm D, thence through bracket E to and through conductorwire q to the binding-post P3, which is the negative pole of the battery, andthe secondary telephonie circuit is as follows: The electric current comes in through line-wire 7i,

thence through plate V, switch-lever S, conductor-wire n2, thence through the coil N, the

ends of which are shown at n and n', thence through binding-post P2, thence through one branch of conductor R to the telephone-receiver M, thence through said receiver and to and through the opposite branch of said conductor R to binding-post P', thence through conductor-wire m2 to and through conductorwire m to binding-post '1), and thence to the ground and off.

As a means for preventing arm D from turning `down too far and striking its heel portion against board A a buffer T is sock- 4eted in board A and arranged to extend sufiiciently from the board so a's to be engaged by the arm heel portion, as shown in Fig. 2.

Contact-plates V and V2 are arranged as shown for the purpose of connecting therewith the line-wires h' and h2 other than the mainline wire h, which line-wires 7L and LZI have termed subordinate lines, intended for the purpose of connecting with other telephonestations which may be brought into service by .adj ustin g switch-lever S to register therewith at the will of the person at the principal telephone apparatus, which may be understood as the apparatus illustrated.

In operation, when the parts are in the position shown in Fig. l the call-bell B in a similar apparatus electrically connectedwith the one shown may be operated to call at that end of the line by pushing on the push-button O, so as to bring the plates O and O" in contact with each other.

XVhen it is desired to use the .apparatus for speaking purposes,the transmitter C is turned down to the position shown in Figs. 2 and 3, and the receiver M is removed from the hook G'l on the outer end of lever G, by means of which the electric circuit between the callbells is broken, and the electric circuit is established between the receiver and transmit ter with those of a similar apparatus. (Not necessary to be shown.) l

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows, to wit:

l. The herein-described electric telephonie apparatus consisting of the combination of the bell-call device, the push-button device, the telephone-transmitter, the telephone-receiver, the secondary induction-coil, the battery, the line-wire contact-plates, the switchlever mechanism, the receiver-supporting lever and latch mechanism, the binding-posts and conductors, all arranged to operate substantially as and for the purpose set forth, wherein the telephone-transmitter is supported by means of a pivoted arm, and adapted to be turned out of or into service, and adapted when turned out of service to automatically break the primary telephonie circuit, and make the bell-call circuit, and when turned into service to automatically make the said primary circuit and break the bell-call circuit, substantially as and for the purpose set forth.

2. In the telephonie apparatus described, in combination with the circuit-conductors, the stud H having the foot-plate H, the switchlever S sleeved on said stud, the hooked lever G having the chambered beveled end hub G sleeved on said stud, the tension-spring S' arranged in said hub-chamber and connecting said levers, the pin I placed through the end portion of said stud in the hollow between the bevel-faces of said hub, the coil-spring placed on said hub and attached at one end to said lever G and attached at its opposite end to a stationary post, substantially as and for the purpose set forth.

3. In the telephonie apparatus described the combination of the hinged transmitterarm D having the side latch-socket D, the hooked lever G, bell-crank latch-leverB` having the beveled latch-piece E, and the nonconducting connecting-rod K, connecting said levers substantially as and for the purpose set forth.

4. In the telephonie apparatus described, the combination of the stud Il', the lever G and hub G' thereof having the beveled end, the switch-lever S, and the springs S and J substantially as and for the purpose set forth.

5. In a telephone system, the combination of the oscillating-lever G, the telephone-receiver adapted to be detachably connected to the end of said lever, the switch-lever S, the means for frictionally connecting said levers, and the means for returning said switch-lever to contact with the. terminal of the mainline. substantially as and for the purpose set forth.

WICTOR A. GUSTAFSON.

IOO 

